Using this helper removes an in-kernel call to the sys_pipe2() syscall.
This patch is part of a series which removes in-kernel calls to syscalls.
On this basis, the syscall entry path can be streamlined. For details, see
http://lkml.kernel.org/r/20180325162527.ga17...@light.dominikbrodowski.net
Cc: Alexander Viro <v...@zeniv.linux.org.uk>
Signed-off-by: Dominik Brodowski <li...@dominikbrodowski.net>
---
fs/pipe.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/fs/pipe.c b/fs/pipe.c
index 7b1954caf388..39d6f431da83 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -841,7 +841,7 @@ int do_pipe_flags(int *fd, int flags)
* sys_pipe() is the normal C calling standard for creating
* a pipe. It's not the way Unix traditionally does this, though.
*/
-SYSCALL_DEFINE2(pipe2, int __user *, fildes, int, flags)
+static int do_pipe2(int __user *fildes, int flags)
{
struct file *files[2];
int fd[2];
@@ -863,9 +863,14 @@ SYSCALL_DEFINE2(pipe2, int __user *, fildes, int, flags)
return error;
}
+SYSCALL_DEFINE2(pipe2, int __user *, fildes, int, flags)
+{
+ return do_pipe2(fildes, flags);
+}
+
SYSCALL_DEFINE1(pipe, int __user *, fildes)
{
- return sys_pipe2(fildes, 0);
+ return do_pipe2(fildes, 0);
}
static int wait_for_partner(struct pipe_inode_info *pipe, unsigned int *cnt)
--
2.16.3
